Date
July 16, 2025, 3:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.444877] ================================================================== [ 16.444953] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 16.445194] Read of size 1 at addr fff00000c7890000 by task kunit_try_catch/148 [ 16.445259] [ 16.445340] CPU: 1 UID: 0 PID: 148 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.445453] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.445487] Hardware name: linux,dummy-virt (DT) [ 16.445517] Call trace: [ 16.445693] show_stack+0x20/0x38 (C) [ 16.445814] dump_stack_lvl+0x8c/0xd0 [ 16.445920] print_report+0x118/0x5d0 [ 16.445974] kasan_report+0xdc/0x128 [ 16.446018] __asan_report_load1_noabort+0x20/0x30 [ 16.446125] kmalloc_large_uaf+0x2cc/0x2f8 [ 16.446172] kunit_try_run_case+0x170/0x3f0 [ 16.446218] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.446436] kthread+0x328/0x630 [ 16.446525] ret_from_fork+0x10/0x20 [ 16.446612] [ 16.446651] The buggy address belongs to the physical page: [ 16.446748] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107890 [ 16.446805] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.446866] raw: 0bfffe0000000000 ffffc1ffc31e2508 fff00000da478c40 0000000000000000 [ 16.446921] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 16.447106] page dumped because: kasan: bad access detected [ 16.447164] [ 16.447266] Memory state around the buggy address: [ 16.447351] fff00000c788ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.447461] fff00000c788ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.447504] >fff00000c7890000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.447541] ^ [ 16.447568] fff00000c7890080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.447798] fff00000c7890100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.448007] ==================================================================
[ 12.090119] ================================================================== [ 12.090583] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 12.090869] Read of size 1 at addr ffff888102a34000 by task kunit_try_catch/165 [ 12.091368] [ 12.091491] CPU: 0 UID: 0 PID: 165 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.091535] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.091546] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.091565] Call Trace: [ 12.091577] <TASK> [ 12.091591] dump_stack_lvl+0x73/0xb0 [ 12.091622] print_report+0xd1/0x610 [ 12.091644] ? __virt_addr_valid+0x1db/0x2d0 [ 12.091668] ? kmalloc_large_uaf+0x2f1/0x340 [ 12.091689] ? kasan_addr_to_slab+0x11/0xa0 [ 12.091710] ? kmalloc_large_uaf+0x2f1/0x340 [ 12.091731] kasan_report+0x141/0x180 [ 12.091767] ? kmalloc_large_uaf+0x2f1/0x340 [ 12.091794] __asan_report_load1_noabort+0x18/0x20 [ 12.091819] kmalloc_large_uaf+0x2f1/0x340 [ 12.091840] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 12.091862] ? __schedule+0x10cc/0x2b60 [ 12.091885] ? __pfx_read_tsc+0x10/0x10 [ 12.091907] ? ktime_get_ts64+0x86/0x230 [ 12.091935] kunit_try_run_case+0x1a5/0x480 [ 12.091960] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.091983] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.092008] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.092032] ? __kthread_parkme+0x82/0x180 [ 12.092053] ? preempt_count_sub+0x50/0x80 [ 12.092133] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.092160] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.092185] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.092211] kthread+0x337/0x6f0 [ 12.092230] ? trace_preempt_on+0x20/0xc0 [ 12.092255] ? __pfx_kthread+0x10/0x10 [ 12.092275] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.092297] ? calculate_sigpending+0x7b/0xa0 [ 12.092323] ? __pfx_kthread+0x10/0x10 [ 12.092345] ret_from_fork+0x116/0x1d0 [ 12.092365] ? __pfx_kthread+0x10/0x10 [ 12.092386] ret_from_fork_asm+0x1a/0x30 [ 12.092418] </TASK> [ 12.092427] [ 12.100268] The buggy address belongs to the physical page: [ 12.100550] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a34 [ 12.100879] flags: 0x200000000000000(node=0|zone=2) [ 12.101189] raw: 0200000000000000 ffffea00040a8e08 ffff88815b039f80 0000000000000000 [ 12.101453] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 12.101830] page dumped because: kasan: bad access detected [ 12.102130] [ 12.102349] Memory state around the buggy address: [ 12.102706] ffff888102a33f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.103072] ffff888102a33f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.103362] >ffff888102a34000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 12.103670] ^ [ 12.103885] ffff888102a34080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 12.104115] ffff888102a34100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 12.104330] ==================================================================